Search
1000 results for “madrox”
-
My #LT6502 is assembled.
The hinges work really well, if a tad fiddly to get right.
The case, well there are a few gaps here and there, this could be improved with more clips.
Also I’ve learned a lot about 3D printing and there is a lot I would change.
But overall, I’m happy with it.
It’s a bit of a chonker but that honestly doesn’t bother me.
#retrocomputing -
Final commands added to EhBASIC;
LINE,
SQUARE,
ELIPSE and
TRIANGLEPLOT and CIRCLE were added a few days ago.
These all use the displays on board acceleration so are very snappy.
Hinges next, then a bug in the keybed, couple of resistor changes for LEDs and it’ll be done.
Well until I start on the expansion card ;) -
Hmmm so printing on a raft solved one problem but the finish isn’t great.
I need to do some more work on trying to clean it up (display bezel).
The hinge is coming along but it’s taking quite a bit of work to get it just right. You can see a couple of the bits on the LHS between screen and base.
I am very pleased with the CF load/save/dir functionality :)
#LT6502 #retrocomputing -
SAVE, LOAD and DIR now working on my #LT6502, though they are NOT FAT compatible. Which is fine with me :)
-
Progress is being made on the case for my #LT6502 project.
I’m quite proud of it so far, the top needs a few tweaks.
Then I need to design the case for the screen. -
Tweaked the colours and made it wider so it’s the width of the screen.
I’m really enjoying this, I feel like it’s time to get back into my James Gleick Chaos book and do some experiments.
But I need to sort CF storage and a few more basic commands.
#retrocomputing #LT6502 -
I did a quick version of the “bubble verse” program on #LT6502 and after a while it’s looking incredible.
I’m going to leave it running for an hour two.
I do want to tweak the code to show what iteration it’s currently on rather than the start iteration.
#retrocomputing -
Don't mess with our cockatoos! Even if you're a fierce predator. https://sydneybirder.com/2026/01/29/cockatoo-chases-off-a-falcon/ #BirdWatching #birds #WildAustralia
-
#LT6502 now has scrolling on the screen, it might not sound like much but it took a lot of work to get right.
#retrocomputing -
I’ve heard about these bulletin boards tha are resurfacing, how would I go about getting online with one or two? I’m thinking about some kind of interface for my #LT6502 project.
-
#LT6502 getting there now.
We now have the LCD working for EhBASIC, I chose an orange/amber colour for the text as I find it easier on my eyes.
This is running from battery.
It has a power on beep, currently I’m pasting code via the serial console.
After I’ve sorted scrolling of the text I’ll be working on loading/saving using the compact flash card.
#retrocomputing -
I got the 9” 800x480 display working on my #LT6502 project. Played with colours and here is a full resolution Mandelbrot.
I’m not convinced about the viewing angle on this panel so I may have a go with the other panel again.
This took about 3 hours. -
I managed to get a BASIC program to read a sector of the CF card on #LT6502 and show it on the display.
New display is due today so I’ll be working on that.
And add those bits to my bios. -
Tweaked the #LT6502 case to make it work with some connectors and add a bit more in the way of clips/fixing for the base lid.
-
My #LT6502 running from battery and generating a Mandelbrot at 800x480, I’m just waiting for the 9” screen and then I can work on the case and the firmware to initialise the screen.
-
So relented and I have ordered an RA8875 based display for my #LT6502.
It’s 9” so not quite what I wanted but give the RA8875 works on both my tower PC6502 and my #LT6502 board where the 7673 based display doesn’t, it seems to be a no brainer really. It’ll be 800x480 at 9” so text should be readable without a microscope which was a worry I had with the 10” 1024x600.
I’ve got a 5” version of this display somewhere so I should be able to get test code going before the 9” arrives. -
#Lt6502 display update: so it seems that driver code I found from the supplier may be incorrect <Doh!>
So I’ll try something tonight to see if I can read a register which is based on the datasheet, or at least my understanding of the datasheet. -
Really struggling to make any sense of the LT7683 data sheet (https://www.buydisplay.com/download/ic/LT7683.pdf) for the display I've chosen for #LT6502 (https://www.buydisplay.com/download/manual/ER-TFT101B4-1-5553_Datasheet.pdf)
I can't even seen to read or write despite it claiming to have the same 6800 style 8bit interface as the RA8875 (which I've used and proven is good).
First problem is, I can't understand of RS = 0 is data or register (anyone know?) I've tried both combinations, I'd LIKE to be able to read any register, but I never get back a consistent value. -
Been working on #LT6502 and it now has Reduced LED brightness, a beeper and compact flash is working.
Next the big challenge, the display. -
Feeling brave I connected the battery to my 6502 laptop board.
It works.
I can power it from battery and I can charge it.One thing I’m puzzled about is the charge LED, with power in+battery connected but no load the charge LED flashes. With a load the charge LED is on. Anyone else used the MP2636 charge IC?
I’ve not measured voltages yet and I haven’t left it charging for more than a few minutes ye either.
One thing, I need to sort the LED brightness, oops.
-
Wohoo! Keyboard input is now working for my #LT6502, so I can type programs and commands into EhBASIC and they work.
However this does highlight a problem with keyboard code, so I need to figure out how to compile C code for #AVR (ATMEGA644P) in ubuntu (windoze has blocked my ATMEL-ICE and I can't be bothered to fight windoze).
Any pointers on how to compile? -
Wohoo! Keyboard input is now working for my #LT6502, so I can type programs and commands into EhBASIC and they work.
However this does highlight a problem with keyboard code, so I need to figure out how to compile C code for #AVR (ATMEGA644P) in ubuntu (windoze has blocked my ATMEL-ICE and I can't be bothered to fight windoze).
Any pointers on how to compile? -
Work on the keyboard link to the main #LT6502 board is going well.
Basic test works, sending and receiving.
I’ve begun integrating it into the firmware, so on boot it shows C/W/M on the keyboard for cold, warm or monitor.
Next up is adding receiving data from the ACIA so the laptop can be fully self contained and not need a console.
#retrocomputing -
Interesting problem with #LT6502 main board, I've got the RAM, ROM, CPU and Glue on now.
I've the minimal glue logic in and I can see it starts EhBASIC and I can even run Mandelbrot.However, it only sends data out when data is coming in. I.e. to see the Mandelbrot being generated I have to hold down a key.....
Glue code is the same as my #PC6502, schematic for the FT245 is the same, so I'm very confused. -
Got my first transputer program running from my #PC6502
Very simple code that spits out 0xAA000000 if it’s a 16 bit transputer and 0xAAAA0000 if it’s 32 bit.
Output is -
<< READ =$AA
<< READ =$AA
<< READ =$00
<< READ =$00Next write something simple to confirm the tool chain I have works.
Then a server program to run on the 6502, so I can then run some Mandelbrot code on the transputer.Long way to go, but fun
#retrocomputing #transputer #6502
-
So the question; what should I try and get running on my #Transputer?
Obviously this is going to be one of my first to try - https://www.geekdot.com/1st-code-example/
But I'd like something that does a memory test maybe, or ideally something that scans a network of Transputers (Yes I have more transputers and yes I am thinking of hooking them all up just because).
links to any suitable tools (sadly all of my current Transputers are integer only) would be gratefully received :) -
Here it is, and oh boy does it get toasty!
Next I best figure out how to get it doing something, like say..... a Mandlebrot! -
FINALLY!!!
The #PC6502 is talking to a #transputer !!
I can now write and read to the memory on the TRAM !!!Colour me very happy!!!